Internetwache CTF 2016: Replace with Grace (web 60)
- Category: web
- Points: 60
Regular expressions are pretty useful. Especially when you need to search and replace complex terms.
The given website is used to “Search & Replace” with regular expressions. From other challenges we know, that we can execute php code using:
(Check out this Stackoverflow answer for details.)
The problem was, that the website filtered some inputs like:
It worked with:
A simple, but nice challenge.